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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132bf3a798f2afff373d4ee3a13e27fad45b3009d61c5764719fc78f13acd1d1' 
  AND token = 'CKotHthkfJeqrp/SeoPYPgWjCbEO4spV3PE/mKAbPio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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