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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a7343f3565d13114159a9092cfa5f0d226f4cd18567591c9942e33fe563b94e' 
  AND token = 'k/HIRErxUYy1rCwORrxWofceKL871aZciM1ICuxJ+8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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