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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fb87eb7a0b628030759f6aa4205fb026a92659d79164a46a320b33ebeaa9216d' 
  AND token = 'kOgovOpRArwuoZb6p6z+fp7yGynyc5yth3Eptww3G4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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