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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d2ce5d0989752ddcfa6bb1b7a0068f5c24a3aadaa1dd9b775ba3b22294323fc' 
  AND token = '7VILhw2VaXAv/NDlOrQD3MrDsJhJDs639onpQzkSRLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00800

JSON explain

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