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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae1795e3056c475263846a51ce775065966b86499d7c735cdd4f2c794231466d' 
  AND token = 'T/eD3mvtj69I3YC2wTT+e/PEgLCzv+61TZQPWq+yIXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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