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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '651e6e1421a3e7f4df73baea5afc812130b624bca11c2b2388ecd39a9fb6736b' 
  AND token = 'hCJlGqQmxRK0ULq2ooRQyfre9T3rrFTDj7jqN1eNI9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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