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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bebf423e7e34a12f5c6bf9ee05479aecd34a45a1d3c7bebb619dd4c4f986497' 
  AND token = '09Kicb6xujy9xUulgTJnk1Hh0ni+yLuumdjh2iYmVPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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