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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37fd096441ab7da626e3e113c4759e206dd838fb5c22767fadd4314f1f7ab51e' 
  AND token = 'zOkcRq/PoAhob11lb8Gtng0g8ePOzMObE5lOYEkRd6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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