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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91231e2eec849f0217eabe6ebb51a0de10fd68818262d19344180759b009f3f9' 
  AND token = 'QEeZ1aKXqinc4Zs4zjxru81/x1FCZer+/3LCfi0G0Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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