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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cdd86a97c19d05285ec5a9e2df19301ca0ff13595c6432dd8b3bff2412b55f9' 
  AND token = '1J8EGoSi3eVLfGhgaa2pjj2wGvfCmAo5A97WrlGxxKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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