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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d54c5e54d75443676d756b657d425c3ae6ead88e93a014aa5d27b60893b3411' 
  AND token = 'LaR1fyvztrZBWeeW2ovUn5c6oBNLM5A9X4Z3+tLZ+Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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