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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ae8430a6cae08abde90e0f9fee353d6479a64baaf1c9a31c4a13baf7f747941' 
  AND token = 'qGKgEcfmB5v3JgKZ2J8qhCja+rFysxOcp03vNUsXw14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}