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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee915e497e964652d0f626088049d40f476fed3bd8b9be69a72df99d9c281848' 
  AND token = 'RJN/z1ViKitArXZB4Gbd5LEmM10H93qUk93iJiaEL+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00127

JSON explain

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