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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbadcab82cd55f2f49179c6188c4afe12dd1131cc7d334d13b76667edb7c79fe' 
  AND token = 'qg6kDE8uHPJ7mB9mreOl3NDgh6prOYKHhc9LrNAW3wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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