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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3008adc9728c5956ed975d00e3b627ef46fde0d596de702f2162e561423ce66f' 
  AND token = 'Tm10M2AwhNeq0AFqnz3+OwONf55Vl186muY7E9gY5r8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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