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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ad45807624a8a19abeece1377908f9c97e2fd13d50da24df995bff9273b2ea5' 
  AND token = 'f/bY3v6xcDOf6pgQ6PHI2jh/AEroXNjf75UKYIOWFeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.02100

JSON explain

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