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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c205186b75d1dc09cb9552edab96cf9123c67a2033a551f54e53cd03eaff221e' 
  AND token = '/iQmK/fWaF+J9qmaYz0MWPhttakKYtiIvz1aUapQvi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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