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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2b469f5cd0b6cef99c01a0913cec211dc706f947116b2a6d7b263ea23ad150c' 
  AND token = 'hLQDmYaA/TbIJtpZ47olb3LPSQJ0j1uhNILUS0OMdzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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