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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cc81d83041b116d00fdfc09af97ed5450db23c5d779a00d32376081e7e5d434b' 
  AND token = 'OWzjL1ZCEHE0Ol2iqMAzsrXXohrAyMT6GpDylF4eNT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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