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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd695c0a4d837d20ef0c9077e90e3d8a89f2638ab3c19424da775ee745c3e50c7' 
  AND token = 'PMVHwh2xTi3OfF/l16d2UcmblChcWLQ4rsOIKHnGoiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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