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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f22571322d0e5e2abd2f098f08d29006e749f90418643377c04ca4cad9bbf06e' 
  AND token = 'Xo5O3rtqUaPuaafC179/fBtH2i2exwgEIq/30Bogu4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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