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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1190a70bc85fc14667b0cf8dd14746470b375e5afb6c4aceaa6e8d37d26ec6b9' 
  AND token = 'x2mesnN/QpPTdvVXqJ28BjBhw5PSMnU5xsynpE/Bdxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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