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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '724e95770a3683e8c69a7ac66df51af0ed74f03ca1158799952592eac23fd3b9' 
  AND token = 'n6Yj0Iq5Cf2cCybgvBibu/YkrGvjjW4WuI9f4/eafqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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