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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d6052aff1d694405316b152c5e54f74a07c90c3a148f667e856e1f37b4626a1' 
  AND token = 'tQRIaxdZb26koMokZWiBpyeV87Mp/Rol6LHlcGOd7Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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