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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c5d5099a2ded226b31ae8b5c1682ec5cbc1f9b23ca1434ebd60f0210623a1720' 
  AND token = '9nTEyncbggfYvWKIA/TJAyjzZic0Lz2ELSwnBvOYxCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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