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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c169f8f32e153ca424b1233b87cab64299fd94aceb5eb6a95f397792ee3359c8' 
  AND token = 'V9Uxh2bD3BE8s6ArrbCP3ZhI5+qeI+x741LBKU9Ibao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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