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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b370fa7acc6be44a6e3d9fea0ce64576e3e98719206852e50e535b0f623805c' 
  AND token = 'a7JnOMHanU9smwTo1pSUIrBv2Fawr7VVJoNY4v6adgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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