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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd61469fa98162e022cbfe8e4a1b361f67554eede54098903a9be1336e0bef5a' 
  AND token = 'fN1rMpoH67ljwafFeB1VS8ax3CdV3SVGTFpgvm/1ih0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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