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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1c370b1e4429b390be3e04add5eb1162cedebd301c652654bbb0f3b78beb524' 
  AND token = '9ZL/DVFWZ1+2pdGpNAniXDCjzsnbJC/qJUVk3I5glzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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