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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c4bd0efd0beab3f189ea8964f10cb766b600e07f9925a8471fc614cbfd6a7ef2' 
  AND token = 'GgSHe9p1+yIA3pRdvuC00vDQ/Pymq+CKdNyzNVXQKSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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